Pump for ink circulating systems



April 26, 1938; A. BEHRINGER PUMP FOR INK CIRCULATING SYSTEMS Filed Dec. 4, 1936 ATTORNEYS I Patented Apr. 2 6, 1938' 2,115,325 rum roa mx cmcum-mzc srsrmas Alfred Behrin'ger, Flushing, Y., assignor'to I Speedry Gravure Corporation, New York, N. 1., a corporation of New York Application December 4, i936, W No. 114,149

lclaim.

The present invention relates to ink pumps for ink circulating systems for use with rotary intaglio printing presses such as shown and described in the U. S. patent to Weiss No. 2,014,303, granted September 10, 1935.

In ink circulating systems of the. type shown in the above Weiss patent, considerable diflicuity is experienced in maintaining an effective seal about the rotating elements of-the pump to avoid loss of ink from the ink circulating system and the consequent injurious effect of the ink which leaks from such systems and. comes into contact with adjacent mechanism including the bearings, pump driving mechanism, etc.

15 The present invention provides a mechanism by means of which leakage of .ink from the ink circulating system is avoided, thus relieving the mechanism from the deleterious eflects of ink leakage, as above noted.

o A further object of the invention is to provide an ink pump of the above character wherein friction ink seals are dispensed with, thus greatly decreasing the amount of power required to drive the pump.

A further object of the invention is to provide a pump mechanism of the above character wherein the structure affords long bearings on the pump shafts where the greatest strain occurs. A further obglect of the invention is to-provide a pump mechanism of the above character wherein the structure is such as to prevent leakage of air into the ink system.

Further objects and advantages of the invention will be apparent as it is described in greater detail in connection with the accompanying drawing, wherein:

Figure 1 is a view in vertical section, taken on a plane passing through the pump mechanism,

constructed in accordance with the present in- 40 vention. The section upon which Figure 1 is taken is illustrated by the line i-l in Figure 2, Figure 2 is a view in transverse section, taken on line 2-2. of Figure l and looking in the .direction of the arrows.

45 Figure 3 is a view in section, taken on the line 2-3 of I 'igure 1 and looking in the direction of the arrows.

Figure 4 is an enlarged sectional view of a packing member partly broken away for a pump.

50 drive shaft.

Referring to the above drawing, a pump housingis shown at II and is provided with an ink intake pipe II and a dischargepipe i2. These pipes may be flanged in order to facilitate con- 55 necting them in the ink systems now the pump.

in common use, as shown diagrammatically in the Weiss patent above referred to. 'Se'curedto the end face of a housing II is a bearing plate i2 upon which a cover plate It is secured. Bearing plate l3 receives the ends vl5 and I of pump shafts l1 and I8, respectively. Suitable bushings I! may be carried by the bearing plate It in order that the shaft ends may be prope y journaled.

.I'he shafts I1 and it are provided with pump .;rotors as shown in Figure 2, these, rotors being received within the pump chamber 21, formed within pump housing l0. The foregoing structure followsstandardpractice in pumpdesign and constitutes no part of the present in.- 15 vention.

In order that leakage of ink may be avoidedfrom the ink circulating system within which pipes ii and I 2 are received a seal is provided about the pump. shafts I! and it, this sea] comprising a housing 22 provided withreiatively long bearings 22 for journaling the shafts l1 and i8. Inasmuch as these hearings receive the greatest relative stress of the shaft bearings included in the mechanism, they are made relatively long, as shown in Figure 1. within the housing 22 a chamber 21 is formed, the chamber being provided with a sump 25 in the lower portion thereof. A passage 28 communicates with the sump 25' and an ink return pipe 21 which com- 30 municates with a passage 28 formed in the intake pipe ll.

Upon shafts l1 and II, discs 29 and 29' are provided respectively. Disc 29 is preferably formed with a peripheral ridge which is received 5 within ajsimilarly formed peripheral groove in the disc 29'. Each of the discs is non-rotatably secured to the respective shafts in order that they may rotate during operation of the ,pump.

' Ink which leaks through the bearings 22 advances 40 along .theshafts ii and it until it reaches the j discs 29 and 22'. Inasmuch as the. discs are rotating during operation of the pump and when ink leakage occurs, the ink is drawn outwardly by centrifugal force and flows to the bottom of the chamber 2| and into the sump 25. Inasmuch as the pipe line 21 communicates with the intake pipe ii, a suction exists in the pipe 21, causing the ink which has leaked' from the be'arims 23 to be returned to the intake s'ide'of '60 To prevent leakage ofair into the chamber 24, the pump housing 22- is formed'with an in-' ,ternal boss 22 throughiwhich the shafts l1 and II extend. Mountedintheboss2l'areoilse'alll 139' niation 'o'f anink froth is avoided.

. washer 1i and annular packing members I! having angularly' related portions lyingconcen-- trically against the shafts l1 and II. The packing members 32 are retained in liquid tight relationship to the shafts l1 and II bya tension spring 32'. The packing member)! and spring 32' are mounted) s itable, housing a which I is held in position by-j afljtaperedcringj, a7 which contactstlie roller bearings 34.

The drive between shafts II and II is pro-g vided by means of Intel-engaging pinions 3', car-' ried' by the respective shafts'and a;su.ita ble-cover 36 is provided upon the end of housing 22. A

locating plate 8! is providedftofniaintaln i bearings 34 in the assembled positions shown.

In operation, any ink leaking through bearings 23 will run down the walls encumber-u to the V sump 25 and/or wi1l flow along the shafts l1 and It to the disks 2!, II. As, the .disksrotate the ink vvill be thrown *centrifugaliy into the chami ber Itwhere 'it;will accumulate, be drawn oi! It will "be understood that construction embodying the 1 invention prevents ink leakage and 'loss iwithout' necessitating a great increase in power: for actuating the pump. Also, the rollerv ing rings of known tyFecon'sisting of s leather bearings and gears from the ink and can be lubricated properly, thereby greatly increasing their useful life. i

It should also be understood that the my variations canbe made in the disclosed embodiment of the invention without deviating from the inventive concept. Therefore, the disclosed em- ,bodiment should be considered as illustrative,

only, and not as limiting thescop'e' of the invention as defined in the following claim.

I claim:

'In an ink pump fonprlnting press ink circulating systems, a housing having intake and dis- I charge connections, means in said housing forcirculating ink from saidv intake connectionthrough said discharge connection, a low. pressure sump chamber attached to said housing, a

conduit connecting said sump chamber to said intake connection, a pair of spaced bearings between the housing and chamber, a second pair of hearings in an outer wall offsaid chamber aligned with the first bearings, a pair of drive shafts journalled in said bearings foractuating said ink circulating means, means hermetically sealing said shafts in the outer wall of said chamber, said sealing means being positioned on the inner side of .the bearings in the outer wall of the said sump chamber to protect' the said bearings from the ink and the'ink vapors within the sump chamber, and disk members carried by said shafts within the sump chamber and having interengaging peripheries for diverting ink'leakinto said chamber.

ing along said shafts ALFRED BEHRINGER, 

